package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品，同时保存对应的口味数据
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        //向菜品表插入数据
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        //获取插入后的id
        Long dishId = dish.getId();

        //向口味表插入数据
        List<DishFlavor>flavors = dishDTO.getFlavors();
        if(flavors != null && !flavors.isEmpty()){
            flavors.forEach(dishFlavor ->{
            dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page <DishVO> page = dishMapper.page(dishPageQueryDTO);
        return new PageResult( page.getTotal(), page.getResult());
    }

    /**
     * 批量删除菜品
     * @param ids
     */
    public void deleteBatch(List<Long> ids) {
        //判断菜品是否在售
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus()== StatusConstant.ENABLE){
                //在售
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //判断菜品的关联数据是否有关联
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds != null && !setmealIds.isEmpty()){
            //有关联
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
//        //删除菜品表中的数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //删除菜品口味表中的数据
//            dishFlavorMapper.deleteByDishId(id);
//        }
        //根据菜品id批量删除菜品数据
        dishMapper.deleteByIds(ids);
        //根据菜品id批量删除菜品口味数据
        dishFlavorMapper.deleteByDishIds(ids);

    }
    /**
     * 根据id查询菜品和对应的口味数据
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
        //查询菜品数据
        Dish dish=dishMapper.getById(id);
        //查询口味数据
        List<DishFlavor> flavors =dishFlavorMapper.getByDishId(id);
        //封装数据并返回
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(flavors);

        return dishVO;
    }

    /**
     * 修改菜品
     * @param dishDTO
     */
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);

        //修改菜品表数据
        dishMapper.update(dish);
        //删除当前菜品对应的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //重新插入当前菜品对应的口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors != null && !flavors.isEmpty()){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //批量插入新数据
            dishFlavorMapper.insertBatch(flavors);

        }
    }

    /**
     * 启用禁用菜品
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        dishMapper.updateStatus(status,id);
    }


    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .status(StatusConstant.ENABLE)
                .categoryId(categoryId)
                .build();
       return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }


}
